code: def test_shared_variables(self):
      v = nnx.Param(1)
      g = [v, v]
  
      state, static = nnx.graph_utils.graph_flatten(g)
  
      assert len(state.flat_state()) == 1
  
      g2 = static.merge(state)
  
      assert g2[0] is g2[1]
  
file_path: flax/flax/experimental/nnx/tests/test_graph_utils.py
imports: import jax
  import pytest
  from flax.experimental import nnx
label_desc: Use image node_id 10 for calling the TestGraphUtils obj's underlying member method code with example usage: obj.test_shared_variables() without return types